Comparing substrate moisture-based daily water use and on-demand irrigation regimes for oakleaf hydrangea grown in two container sizes

Hagen, Ethan; Nambuthiri, Susmitha; Fulcher, Amy; Geneve, Robert L.

doi:10.1016/j.scienta.2014.09.008

Cited by 20 publications

(28 citation statements)

References 10 publications

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“…Nambuthiri et al (2017) reported that the moderate moisture deficit created by on-demand irrigation systems improved WUE by reducing the water use and leachate volume without a negative effect on plant growth. A plant-based irrigation schedule improved irrigation efficiency in Hibiscus rosa-sinensis 'Cashmere Wind', oakleaf hydrangea (Hydrangea quercifolia 'Alice'), and slender deutzia (Deutzia gracilis) (Fulcher et al, 2012;Hagen et al, 2014;Nambuthiri et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…The lower set point was the VWC expected to maintain photosynthesis at 90% of the predicted maximum photosynthetic rate, resulting in 0.25 and 0.36 cm 3 · cm -3 for the 0% and 25% biochar rate, respectively. The upper set point for this method was the effective container capacity, defined as the VWC after substrate saturation and drainage of gravitational water but before evaporation losses occurred (Hagen et al, 2014). Effective container capacity values were 0.46 and 0.58 cm 3 · cm -3 for the 0% and 25% biochar rate, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The simplest method (hereafter called the substrate-based method) is to assume a range of plant-available water tensions, usually defined as -1 kPa and -10 kPa (Arguedas-Rodriguez, 2009), although this range can be extended beyond -10 kPa tension to achieve greater water savings (Fields et al, 2016). A more recently established method of predicting crop water use by plant physiological status (Cifre et al, 2005;Jones, 2004) can be based on the relationship between photosynthetic rate and substrate moisture content before the plant photosynthesis rate is reduced by water stress (Fulcher et al, 2012;Hagen et al, 2014;Nambuthiri et al, 2017). This method is hereafter referred to as the plant-based approach.…”

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confidence: 99%

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Evaluating On-demand Irrigation Systems for Container-grown Woody Plants Grown in Biochar-amended Pine Bark

Jahromi¹,

Fulcher²,

Walker³

et al. 2018

horts

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Evaluating On-demand Irrigation Systems for Container-grown Woody Plants Grown in Biochar-amended Pine Bark

Jahromi¹,

Fulcher²,

Walker³

et al. 2018

horts

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“…Furthermore, Hagen et al [22] showed that photosynthetic rate (Pn) in oakleaf hydrangea (Hydrangea quercifolia "Alice") declines to near zero below 0.2 cm•cm −1 VWC. Niu et al [23] reported Pn of six species of bedding plants varied according to VWC, but Pn was at or near zero when VWC was between 0.10 and 0.15…”

Section: Discussionmentioning

confidence: 99%

Rice Hull Mulch Affects Germination of Bittercress and Creeping Woodsorrel in Container Plant Culture

Altland¹,

Boldt²,

Krause³

2016

AJPS

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Mulches are commonly used to control weeds in container nursery crops, especially in sites where preemergence herbicides are either not labeled or potentially phytotoxic to the crop. Parboiled rice hulls have been shown to provide effective weed control when applied 1.25 to 2.5 cm deep over the container substrate surface. The objective of this research was to determine if weed seed placement, above or below the mulch layer, affects flexuous bittercress or creeping woodsorrel establishment. Seeds of both species were placed either above or below rice hull mulch layers 0, 0.6, 1.3, or 2.5 cm deep in nursery containers with a 80 pine bark: 20 sphagnum peat moss substrate. Establishment of both weeds decreased with increasing mulch depth. Establishment of both species was generally greater from beneath the mulch compared to when seed were applied above the mulch. Light penetration through varying depths of rice hulls was determined with a spectroradiometer. Photosynthetically active radiation (PAR) decreased exponentially with increasing rice hull depth, and was less than 1 µmol•m −2•s −1 beneath depths greater than 1 cm. Germination of both species was determined in Petri dishes placed beneath varying densities of shade cloth. Flexuous bittercress germination responded quadratically to decreasing light level, but still germinated (13%) in complete darkness after 3 weeks. Creeping woodsorrel germination was not affected by light level and was high (92%) after 3 weeks. The role of light exclusion by rice hulls as a mechanism for controlling buried weed seed is discussed. Water retention immediately after irrigation, and for 24 hr following irrigation, was determined for a 2.5 cm layer of rice hulls, sphagnum peat moss, and pine bark. Rice hulls retained less water, and dried more quickly than peat moss or pine bark. The volumetric water content of the rice hull layer is less than 0.20 cm•cm −1 and what has been shown necessary for plant growth. Lack of water availability in the rice hull layer is discussed as the primary mechanism of control of weed seed above the mulch layer.How to cite this paper: Altland, J.E., Boldt,

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“…In recent years there has been a plethora of work regarding various sensors and sensor networks for improving irrigation management and efficiency (Capraro et al, 2008;Coates et al, 2013;Evett et al, 2011;Goumopoulos et al, 2014;Greenwood et al, 2009;Lea-Cox et al, 2013;van Iersel et al, 2013;Vellidis et al, 2008). However, information concerning the location of sensors is either nonexistent, empirical, experiential, or based on complicated spatiotemporal experiments which are site and crop specific (Capraro Dobbs et al, 2013;Hagen et al, 2014;Kloss et al, 2014;Pardossi et al, 2009;Phillips et al, 2014;Shi et al, 2015;Soulis et al, 2015;van Iersel et al, 2013). Among these sensors, the tensiometer is considered one of the best and simple devices to measure the matric head in soils (Taylor, 1965) and, hence, water availability.…”

Section: Introductionmentioning

confidence: 99%

The influence of water uptake on matric head variability in a drip-irrigated root zone

Dabach

Shani

Lazarovitch

2016

Soil and Tillage Research

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Comparing substrate moisture-based daily water use and on-demand irrigation regimes for oakleaf hydrangea grown in two container sizes

Cited by 20 publications

References 10 publications

Evaluating On-demand Irrigation Systems for Container-grown Woody Plants Grown in Biochar-amended Pine Bark

Evaluating On-demand Irrigation Systems for Container-grown Woody Plants Grown in Biochar-amended Pine Bark

Rice Hull Mulch Affects Germination of Bittercress and Creeping Woodsorrel in Container Plant Culture

The influence of water uptake on matric head variability in a drip-irrigated root zone

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